Cadmium Oxide (CdO) Semiconductors

Topics Covered

Description

Cadmium oxide is an inorganic compound with the chemical formula CdO. It crystallizes in cubic rocksalt lattice with anion centers and octahedral cation. It occurs naturally in the rare mineral monteponite. It can be found as brown or red crystals or colorless amorphous powder. It is an n-type semiconductor produced by burning elemental cadmium in air.

Applications

Cadmium oxide finds applications in the following:

Electrodes for storage batteries

Ceramic glazes

Electroplating baths

Pigments

Cadmium salts

Catalysts

Nematocide.

Chemical Properties

The chemical properties of cadmium oxide are provided in the table below:

Chemical Properties

Chemical Formula

CdO

Molecular Weight

128.41

CAS No.

1306-19-0

Group

Zinc – 12
Oxygen – 16

Crystal Structure

Cubic

Lattice Constant

4.6953 Å

Electrical Properties

The electrical properties of cadmium oxide are provided in the table below:

Electrical Properties

Magnetic Susceptibility

-0.000030

Band Gap

2.5 eV

Hole Mobility

531 cm2/Vs

Thermal, Mechanical and Optical Properties

The thermal, mechanical and optical properties of cadmium oxide are provided in the tables below:

Thermal Properties

Thermal Conductivity

0.7 W/mK

Thermal Expansion Coefficient

14x10-6 K-1

Specific Heat Capacity

43.639 J/mol K

Mechanical Properties

Density

8.15 g/cm3

Melting Point

1427°C

Boiling Point

1559°C

Optical Properties

Refractive Index

2.50

Safety Information

Safety Information

GHS Hazard Statements

H301 Toxic if swallowed
H330 Fatal if inhaled
H341 Suspected of causing genetic defects
H350 May cause cancer
H361 Suspected of damaging fertility or the unborn child
H372 Causes damage to organs through prolonged or repeated exposure
H400 Very toxic to aquatic life.

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